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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
6774 |
|
6775 | /** |
6776 | * Filters the pingback source URI. |
6777 | * |
6778 | * @since 3.6.0 |
6779 | * |
6780 | * @param string $pagelinkedfrom URI of the page linked from. |
6781 | * @param string $pagelinkedto URI of the page linked to. |
6782 | */ |
6783 | $pagelinkedfrom = apply_filters( 'pingback_ping_source_uri', $pagelinkedfrom, $pagelinkedto ); |
6784 |
|
6785 | if ( ! $pagelinkedfrom ) { |
6786 | return $this->pingback_error( 0, __( 'A valid URL was not provided.' ) ); |
6787 | } |
6788 |
|
6789 | // Check if the page linked to is on our site. |
6790 | $pos1 = strpos( $pagelinkedto, str_replace( array( 'http://www.', 'http://', 'https://www.', 'https://' ), '', get_option( 'home' ) ) ); |
6791 | if ( ! $pos1 ) { |
6792 | return $this->pingback_error( 0, __( 'Is there no link to us?' ) ); |